#include <stdio.h>

void swap(int x, int y);

int main(void)
{
	int x = 3, y = 5;

	swap(x, y);
	printf("x = %d\n", x);
	printf("y = %d\n", y);

	return 0;
}

void swap(int x, int y)
{
	int t;

	t = x;
	x = y;
	y = t;
}